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4E-8-A Bad Day for the Dinosaurs
Scientific evidence suggests that it was a bad day for non-avian dinosaurs when a large asteroid or a comet crashed into the Earth about 66 million y…
7 years, 2 months ago
516-Space Weather
Space is not all that far away. If a powerful solar eruption in 2012 had happened a week earlier, the blast of radiation would have caused wide spre…
7 years, 2 months ago
3E-3-Finding Earth Approaching Objects
Using 2 telescopes near Tucson Arizona, the NASA funded, Catalina Sky Survey searches for Earth Approaching Objects. The method is to take 4 images o…
7 years, 3 months ago
515-Dust Moons
The discovery of two large ghostly neighbors approximately 65,000 by 45,000 miles in size at the L4 and L5 sites approximately 250,000 miles from bot…
7 years, 3 months ago
2E-Voyager I's Baby Step
Looking into the sky on a clear-dark night, have you wondered what it would be like to travel in deep space?
7 years, 3 months ago
514-Close Space Rocks
Since 1900 there have been 11 close approaches by asteroids larger than 300 feet in diameter. One of them, the Tunguska Object was about 400 feet in …
7 years, 3 months ago
513-Mtn Ops
My team, the Catalina Sky Survey, would not find a single asteroid without Steward Observatory's Mountain Lemmon Operations, or Mtn Ops for short. Bo…
7 years, 3 months ago
512-Aten
Aten Asteroids are stealthy space rocks which can be dim and hard to detect since for most of their path about the Sun their illuminated side is faci…
7 years, 3 months ago
E1-Russian Fireball February 15, 2013
Have you wondered what would happen if a rock from space landed near one of our large cities? We got a clue on February 15, 2013 when a large firebal…
7 years, 3 months ago
510-Fourth Closest
Ten hours and 46 minutes after my Catalina Sky Survey teammate Greg Leonard discovered a Toyota RAV4 sized space rock, now named 2018 UA, streaking t…
7 years, 3 months ago